natural systems and concepts (water and carbon) Flashcards

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1
Q

isolated systems

A

no inputs or outputs

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2
Q

closed system

A

inputs and outputs of energy but not matter e.g the water cycle

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3
Q

open system

A

inputs and outputs of both matter and energy e.g drainage basin system

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4
Q

dynamic equillibrium

A

inouts and outputs are balanced

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5
Q

negative feedback

A

when something maintains the system and remains in equillibrium

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6
Q

positive feedback

A

an event which leads to disequilibrium e.g storm surge at the coast

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7
Q

Characteristics of systems

A

Have boundaries
They are generalised
They function with inputs and outputs
They involve the flow of material between components

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8
Q

Positive feedback example

A

Global temps rise
Increased ocean temps
Dissolved CO2 released by warmed oceans
CO2 back in atmosphere
Global temps riss

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9
Q

Negative feedback example

A

Increase use of fossil fuels
Increase in atmospheric CO2
Global temps increase - more plant growth
Photosynthesis reduces atmospheric co2

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